1 EXHIBIT 11.1 STATEMENT RE: COMPUTATION OF EARNINGS PER SHARE USA TRUCK, INC. Three Months Ended Nine Months Ended September 30, September 30, --------------------------- --------------------------- 1999 1998 1999 1998 ------------ ------------ ------------ ------------ Numerator: Net income and comprehensive income .... $ 1,688,989 $ 2,822,007 $ 6,447,909 $ 7,957,802 ============ ============ ============ ============ Denominator: Denominator for basic earnings per share - weighted average shares ........ 9,298,377 9,417,520 9,369,589 9,407,007 Effect of dilutive securities:- Employee stock options ................. 37,595 95,434 38,994 83,080 ------------ ------------ ------------ ------------ Denominator for diluted earnings per share - adjusted weighted average shares and assumed conversions ......... 9,335,972 9,512,954 9,408,583 9,490,087 ============ ============ ============ ============ Basic earnings per share ............... $ 0.18 $ 0.30 $ 0.69 $ 0.85 ============ ============ ============ ============ Diluted earnings per share ............. $ 0.18 $ 0.30 $ 0.69 $ 0.84 ============ ============ ============ ============